[DB_DataObject] joinAdd problems

hi, Been trying to use joinAdd, with no luck. I have a links table set up, and have been able to use getLinks() OK (which I hope proves that it is OK). But when I try and use joinAdd, I notice that the value for $_DB_DATAOBJECT in joinAdd is: DB_DATAOBJECT = Array (

    [RESULTS] => Array
        (
        )

    [CONNECTIONS] => Array
        (
        )

    [INI] => Array
        (
        )

    [LINKS] => Array
        (
        )

    [LASTERROR] =>
    [CONFIG] => Array
        (
            [database] => pgsql://....deleted......
            [schema_location] => /Users/ghopson/Work/ITAccounting/clearsky/lib/DataObjects
            [class_location] => /Users/ghopson/Work/ITAccounting/clearsky/lib/DataObjects
            [require_prefix] => lib/DataObjects/
            [class_prefix] => EO_
            [ignore_sequence_keys] => ALL
            [extends_location] => BusinessObject
            [extends] => BusinessObject
            [debug] => 5
            [production] => 0
        )

    [CACHE] => Array
        (
        )

) In other words, my LINKS array is empty. I have logged it out in getLinks(), and the links array is filled as I expect. What has happened to it? (I'm using version 0.16). Thanks for any help, Geoff -- Geoff Hopson Objectology Ltd. http://www.objectology.co.uk/